Famous attacks: Anonymous – DDOS attack on Visa, Mastercard, PayPal to protest the arrest of Julian Assange (WikiLeaks). Google/Twitter/SayNow worked together to provide communication for the Egyptian people when the government did an internet blackout during the 2011 protests.

Governments:

State sponsored hacking is common; often you see the attacks happening between the hours of 9 and 5 in that time zone; this is a day job.

Approximately 120 countries have been developing ways to use the internet as a weapon to target financial markets, government computer systems and utilities.